(19)

(11)

EP 1 180 292 A1

(12)

(43) Date of publication: 20.02.2002 Bulletin 2002/08 (21) Application number: 00929541.1 (22) Date of filing: 19.05.2000

(51) International Patent Classification (IPC)7: H04L 29/06 (86) International application number: PCT/EP0004/558 (87) International publication number: WO 0074/341 (07.12.2000 Gazette 2000/49)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 27.05.1999 EP 99109283 (71) Applicant: Telefonaktiebolaget L M Ericsson (Publ) 126 25 Stockholm (SE)	(72) Inventors: LUDWIG, Reiner D-52355 Düren (DE) RATHONYI, Bela S-214 40 Malmö (SE) (74) Representative: HOFFMANN - EITLE  Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)